Three-insulator high tension switch



y 1934- E. E. ANDERSON 1,957,814

THREE-INSULATOR HIGH TENSION swmcn Filed July 17, 1929 6 Sheets-Sheet 1Z 722 esi'f Qndenson,

y 1934- E. E. ANDERSON 1,957,814

THREE-INSULATOR HIGH TENSION SWITCH Filed July 17, 1929 6 Sheets-Sheet 2y .8, 1934- E. E. ANDERSON 1,957,314

THREE-INSULATOR HIGH TENSION SWITCH Filed July 17, 1929 6 SheetsSheet 3frrzesii and 6760711 GER 7 5 May 8, 1934. E. E. ANDERSON THREE-INSULATORHIGH TENSION SWITCH Filed July 17, 1929 6 Sheets-Sheet 4 rn/Em 27.27

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.. May 8, 1934. E, ANDERSON 1,957,814

THREE-INSULATOR HIGH TENSION SWITCH Filed July 17, 1929 6 Sheets-Sheet 5finesif (znderson,

y 8, 1934- E. E. ANDERSON 1,957,814

- THREE-INSULATOR HIGH TENSION SWITCH Filed July 17, 1929 e Sheets-Sheete Em /:.z-' frizesif'. andertson.

Patented May 8, 1934 UNITED STATES PATENT OFFICE.

5 Claims.

This invention relates in general to improvements in a gang operateddisconnecting; switch, and more particularly to a three insulator switchin which the blade ismoved vertically and which has a rotating insulatorfor operating the switch blade.

It has been the pracfiice in the past for manufacturers of this type ofswitch to furnish a difierent switch depending upon how the switch is tobe mounted. Switches of this type are usually mounted with their basesvertical, or horizontal in which case the insulators are either abovethe base or under slung below the base. Where different switches arefurnished for the diiferent mountings, the maintenance is very high, asit is not possible to mount one switch in any of the positions withouthaving additional parts to adapt them for the different positions. Incases of emergency, it is very common to move a disconnecting switchfrom one location to another location Where it may be mounted in adifferent position than originally mounted. It is, therefore, veryimportant tohave a switch which may be easily adapted for mounting inany position simply by reassembling the parts.

The service of the present forms of gang operated air break switches islimited to rupture very small power loads which are usually little morethan the charging current of transformers and lines. In the present daypractice where electrical energy is transmitted over long lines at highvoltages, this charging current becomes considerable. It has, therefore,been a problem to break the charging current with the ordinary type ofdisconnecting switch. Attempts to break these greater loads impose ahazard not only against the equipment, due to the possibility of shortcircuiting the phases by flaming arcs caused by the opening of theswitches, but also against human life. It is, therefore, advantageous tohave disconnecting switches which may be opened under load and whichwill not establish flaming arcs.

Another important factor in the operation of high tension lines is toinstall disconnecting switches having a locking means which will holdthe switch in the closed position and prevent it from being opened byshort circuits or line surges.

It has been a manufacturing problem, particularly with vertical breakswitches in which a ro'ating insulator is employed, to provide asuccessiul bearing for the rotating insulators. It has been the practicewith manufacturers to furnish a very long bearing in order to take careof horizontal stresses on the insulators. This bearing has thedisadvantage of sticking through the supporting channel which forms thebase and prevents the base from being mounted on a flat surface.

Various means have been used by manufac turers for transmitting therotary motion of the revolving insulator to the Switchblade whichoperates in a vertical plane. These schemes have ordinarily consisted ofvarious linkages which require a considerable space between the hinge ofthe switch blade and the rotating insulator. This is a disadvantage asit requires more space for nting the switch.

It is therefore an object of this invention to provide a gang operateddisconnecting switch which may be mounted in any position by simplyreassembling the parts of the switch.

It is also an object ofthis invention to provide a gang operated switchwhich is capable of breaking a loaded circuit without establishing aflaming are.

A further object of this invention is to provide a gang operated switchwhich includes an operating mechanism that will hold it securely lockedin a closed position.

Another object of this invention is to provide a gang operateddisconnecting switch having a rotating insulator with an improvedbearing.

Another object of this invention is to provide an improved means fortransmitting the rotary motion of the revolving insulator to thevertical moving switch blade.

Other and further important objects of this invention will be apparentfromthe disclosures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated on the drawings andhereinafter more fully described.

On the drawings:

Figure 1 is an enlarged elevational view of one leg of the gang operatedswitch.

Figure 2 shows the switch mounted on a sustaining structure with thebase in the horizontal position and the insulators'above the base.

Figure 3 shows a unit pole of the switch mounted upon a sustainingstructure with the base in a vertical position and the insulatorsextendinghorizontally from the base.

Figure 4 shows one leg of the switch mounted upon a sustaining structurewith the base in a horizontal position and the insulators below thebase.

Figure 5 is an enlarged fragmentary view of the support for therevolving insulators and'having a cut-out portion in section through thebearing.

Figure 6 is an enlarged fragmentary view of the air break contact havinga cut-out portion showing the contact sheath in section.

Figure 7 is a plan view or" the switch as shown in Figure 1, except thatthe sustaining structure is omitted.

Figure 8 is a view showing the relation of the universal swivel togglemechanism to the switch blade and rotating insulator when the switchblade is in the open position.

Figure 9 is a transverse section through the air break contact.

Figure 10 is a plan View of the concentric grooves used on the finalseal of the fluid break switch.

Figure 11 is a view showing the relation of the universal swivel togglemechanism to the switch blade and rotating insulator when the blade isin the closed position.

Figure 12 is an enlarged fragmentary view showing the upper support forthe rotating insulator having a cut-out section through the upperbearing.

Figure 13 is a schematic diagram showing two hermetically sealed tubesin parallel, each tube having its contacts connected in series.

Figure l is a schematic diagram showing one hermetically sealed tubehaving two rows of contacts in parallel, the contacts connected inseries.

Figure 15 is a schematic diagram showing one hermetically sealed tubehaving two rows of contacts, the contacts connected in parallel.

Figure 16 is an enlarged view of the hermetically sealed fluid breakswitch in the position as shown in Figure 2 and having cut away portionsshowing the contact mechanism.

Figure 17 is an enlarged view of the herm tically sealed fluid breakswitch in the position shown in Figure 3 having cut away portions toshow the contact mechanism.

Figure 18 is an enlarged view of the hermetically sealed fluid breakswitch in the position shown in Figure 4 having cut away portions toshow the contact mechanism.

Figure 19 is a transverse cross section through the hermetically sealedfluid break switch tube taken on line XIX-XIX of Figure 16.

Figure 20 is a fragmentary cross section through the final sealingscrew, washer and screw seat.

As shown on the drawings:

A unit pole of the gang operated disconnecting switch is shown in Figure1 mounted in a horizontal position with the insulator above a mountingbase i. Insulator pins 2, which support the conventional type of hightension insulator 3, are secured to the top of the mounting base nearits end; by means of bolts 4 which extend through the base of theinsulator pins, the mounting base, and a plate 5. This plate makes itpossible to secure the cap end of the insulator to the mounting base bymeans of the cap bolts 6, and the insulater pins to the castings and 72by means of bolts l, when the disconnecting switch is mounted in theunderslung position as shown in Figure 4. An insulator 7 having the samecharacteristics electrically as the insulator 3 is mounted upon aninsulator pin 8 which is rotatably secured to a lower bearing by meansof bolts 9. When the switch is mounted in the under-hung position asshown in Figure 4, this insulator is turned over and the cap of theinsulator is secured to this lower bearing by means of bolts 10, and theinsulator pin to a cap casting 36 by means of bolt 9. A lever arm shaftcasting 11 is designed so that it may be bolted to either the pin or capof the insulator depending upon the position in which the switch ismounted. This casting is provided with a lever arm 12, the outer end ofwhich terminates in a clevis 13 which is drilled for receiving a clevispin 14. Integral with the lever arm shaft casting is a depending stubshaft 15 which forms a thrust shoulder 16 on the casting. The stationarysupporting member 17 for the lever arm shaft casting is secured to theunderside of the channel by means of bolts 18. At the center of thismember is an upwardly extending portion 19 which passes through anaperture 20 in the channel and forms an annular flange surrounding thestub shaft 15. The upper end of this flange has an annular groove 21which forms a ball race for the balls 22. These balls protrude upwardlyfrom the ball race groove 21 and engage the shoulder 16 of the lever armshaft casting and also engage the stub shaft 15. The lower end of thestubshaft 15 is threaded for receiving a screw 22 which secures arevolving plate 23 to the end of the shaft. The upper portion of thisplate follows the general contour of the stationary supporting memberand is separated therefrom by a small clearance. The circumference ofthis plate 23 contains an annular groove 24 which coacts with adepending annular flange 25 on the stationary plate to form a ball racefor the balls 26. It is to be noted that the upper ball race is ofsmaller diameter than the lower ball race. The upper ball race takes thethrust of the rotating insulator, and also any axial forces exerted,whereas the lower ball race gives a stabilizing effect to the stub shaft15 which is the equivalent of a very long shaft and gives the addedadvantages of allowing the supporting channel to be mounted on a flatsurface. This would be impossible if a long shaft protruded be low thechannel. While the structure used in this particular case includes anupper ball race of small diameter, it is evident that either race may beof large diameter and still come within the intention of this invention.It is not the intent to limit the scope of this invention to the use ofball-bearings, since it is contemplated that any suitable hearing may beused such as Babbitt metal and the like.

This arrangement of ball races to secure steady rotation of a shaftabout its center, when supported only on one end, or the use of plainsurfaces similarly arranged to produce this same result is applicable tomachine designs in general and it is not purposed to limit the inventionto its use in electrical power switches only.

It is contemplated, that a plurality of the unit poles may be operatedsimultaneously when used as a gang switch. This operation may be eitherby hand or motor mechanism at a convenient lo- 28 which are securelyattached to the switching A crank 29 secured to the top end ofstructure. the vertical pipe has a member 29a rotatably mounted at itsouter end; this member having a lug pivotally attached to a clevis 36which is rigidly secured on one end of a link formed by a length of pipe315 A similar clevis 32 is connected to the other end of the pipe bymeans of a swivel member 3211, which allows the clevis 32 to beangularly rotated relative to clevis 30.

Clevis 32 is in pivotal engagement with a lug on the member 33a, saidmember being rotatably mounted on the clamp 33 which is secured to thepipe 34. It should be noted that this arrangement effects a universalswivel toggle joint connection between the pipes 27 and 34, and producesan operating mechanism which can be used to operate the switch in any ofits various positions of mounting, and one in which the relativepositions of the various members may be varied over a wide range. Theclevis 13 of each unit pole is pivotally secured to a clamp 35 which issecured to the pipe 34. It is therefore evident that in the gangoperation of a number of unit poles that the rotating insulator of eachpole will be simultaneously rotated upon the rotation of the verticalpipe 27 either by hand or motor mechanism.

The upper end of the rotating insulator has the cap casting 36, Figure12, secured by cap screws 10. Integral with the cap casting 36 andcentrally disposed in an upwardly extending short shaft 37, which passesthrough a bearing 38 in a hinge support casting 39. A shoulder 40 isformed on the shaft and co-acts with a depending flange 41 of thebearing 38 to form a ball race for the balls 42. This upper bearing ofthe rotating insulator serves a double purpose, the balls engaging thevertical sides and the horizontal sides of the ball race. This hearingwill therefore take care of any axial forces exerted by the hingesupport casting 39 and also any transverse forces exerted upon therotating insulator.

A crank 43 is secured to the upper end of the shaft 37 by means of a pin44. This crank will therefore be rotated simultaneously with therevolving insulator. The hinge support casting 39 is composed ofintegral diverging arms, one of which is secured to the hinge terminalcasting 45 by the bolts 46. The hinge terminal casting is in turnsecured to the stationary insulator 3 by means of cap screws 6. Boltedconnections are provided on this terminal for the terminal end of theline and also for the flexible conductor 47. The blade bar is a tube 48which threadedly engages the hinge blade casting 49 and is securelyclamped therein by clamping screw 50. The hinge blade casting ispivotally secured by the pin 51 to the free ends of the other arm of thehinge support casting 39. A lug 52 disposed in angular relation to theblade bar 48 forms a part of the hinge casting and is drilled at itsouter end to receive the upper pivot member 53 of the universal swiveltoggle. The upper pivot member is threaded for a standard hexagonalmachine nut 54 and shouldered for a tight fitting washer under the nutso that the upper pivot member will just be free to move in the hingeblade casting lug. The upper fork castings 55 of the universal swiveltoggle is pivoted to the upper pivot member by means of pivot pin 56 andan adjustable length swivel member 57 is threadedly secured to the lowerportion of the upper fork casting 55 and held firmly in place withthelock nut 58. The lower portion of the swivel member is rotatably securedto the lower fork casting 59 by means of the hexagonal nut 60 whichtightened against a washer which bears against a shoulder on the swivelmemher. This swivel member also provides an adjustment for the switchblade to assure proper closing of switch contacts. The lower forkedcasting 59 is pivotally secured by means of pivot pin 61 to the lowerpivot member 62 which is identical to the upper pivot member 53. Thelower pivot member is rotatably secured to the outer end of the crank 43by means of the hexagonal nut 63 which tightens a washer against ashoulder of the pivot member in such a manner that the lower pivotmember is free to move with a rotary motion. It is important to observethe effect of the operating forces in the structure just described.Since the shaft 37 has a limited, if any, longitudinal movement throughthe bearing 38 which is integral with the arm of the casting 39, havingits outer end secured to casting 45; it follows that any longitudinalforces exerted on said shaft will be carried to said fixed arm.Therefore, when the crank 43 which is secured to the shaft 37 is rotatedto operate the switch blade, forces are exerted by virtue of theuniversal swivel toggle mechanism, which tend either to increase ordecrease the angle of divergence between the two arms of the casting 39.Now, it follows, that since the arm associated with the shaft 37 isfixed and the other arm is free at its outer end, stresses resultingfrom these forces are set up and confined to the casting 39 and are notcommunicated to the rotatable insulator through the shaft 37. By thisarrangement large operating forces may be utilized without submittingthe rotatable insulator to undue stresses.

The contact end of the blade bar 48 threadedly engages a fork casting 64and is securely clamped therein by bolt 65. This fork casting is drilledwith clearance holes for the support pins 66 of the full floatingcontact support casting 67, which is provided with a clamping means formaking a solid connection to the flexible conductor 47 after it has beencarried through the blade bar tube 48. Guide prongs 68 are secured tothe full floating contact support casting and in an emergency operationthese prongs become arcing fingers for breaking the circuit of thearcing blade guide horn 69. The full floating contact support casting isdrilled and tapped to receive either the contact sheath 70 or thecontact plunger 71. interchangeability gives a contact which is thoroughly housed against weather in any position in which the switch may bemounted. A contact casting 72 is secured to the insulator by the capbolts 6 and is drilled and tapped to receive either the contact plunger71 as shown in Figure 6, or the contact sheath 70. The contact castingacts as a support for the guide horn 69 and also provides a lug to whichthe line terminal connection may be bolted.

The female member of the contact comprises the sheath 70 having aplurality of sockets 73 for receiving conducting spheres 74, which arebacked up by connector straps 75 solidly fastened to one end of thesheath by screws 76. These conductor straps are enclosed by acylindrical close wound coil spring 77, which exerts spring pressure onthe spheres, forcing them to the bottom of their respective sockets,where their further movement is arrested by an inturned edge of thesocket. It will be noted that in this position the spheres projectslightly past the inner wall of the sheath and make contact with thecontact plunger 71. The entrance end of the contact sheath has a taperedorifice, which forms a guide for the contact plunger as it enters thecontact sheath. The entire contact sheath is enclosed by cylindricaltube 78 which is securely fastened at its ends to the sheath by means ofthe screws 79.

This cylindrical tube therefore protects the conwhich in turn are forcedfirmly against the enclos This ing spring; this spring being free toweave or float together with the connector straps and spheres. Theresult is that each sphere is under spring pressure and forms a pressurecontact between each sphere and the contact plunger as well as betweeneach sphere and its connector strap. The spheres being free to roll orfloat in their respective sockets, a wiping contact is secured, thusinsuring a multiplicity of clean contact points each of which has adefinite current carrying capacity. The capacity of the contact istherefore proportional to the number of points of contact, and permitsof a definite current rating to be given the contact.

A fluid switching unit is supported on one end by a protecting arm orcrank which is securely bolted to the hinge casting 49 by means of bolts81; and on the other end by a rotatable arm or crank 82 which ispivotally secured to 9. lug 83 forming a part of the contact casting 72.The respective ends of the fiuid switching unit are designated by A andB. A supporting and terminal casting is provided at the A end of thefluid switching unit as shown in Figure 1, comprising a ferrule 84having an arm 85 which is loosely pivoted to the crank 80 by means of abolt 86. The B end of the fluid switching unit as shown in Figure 1, hasa similar supporting and terminal casting consisting of a ferrule 87having an arm 88 which is loosely pivoted to the crank 82 by means of abolt 89. Solidly bolted connections are provided to each end of thefluid switching unit; a flexible conductor 90 being secured to the arm85 on one end and clamped on the other end to the flexible conductor 47,and a flexible conductor 91 secured on one end to the arm 88 and on theother end to the lug 83 on the contact casting 72. The contact mechanismof the fluid switching unit is hermetically sealed within a tube 92,preferably of a vitreous material but not necessarily, which is filledwith an arc extinguishing fiuid (not shown on the drawings) Each end ofthe tube is sealed into the respective ferrules 84 and 87.

These ferrules are similarly constructed and comprise a circular baseportion 93, Figure 16, having a circumferential flange disposed at rightangles to each side thereof. The tube 92 is sealed into one of theseflanges and the other flange is drilled to receive radially disposedscrews for securing the ferrule to its associated supporting andterminal casting. A bracket 94 is secured by a screw 95 to the baseportion 93 of the ferrule on the A end of the tube and by a screw 96 toan insulating bar 9'7 which supports a series of gaps in the arcextinguishing fluid; the .Jracket making electrical contact with theterminal side of the last gap. The other end of the insulating bar isfree to move longitudinally on a guide pin 98, when expanded orcontracted by changes of tempera ture. This guide pin is secured to thebase portion 93 on the 13 end of the tube and slidably engages the freeend of the insulating bar. A flexible connector 99 completes theelectrical circuit from the terminal side of the last gap to the base93. A plurality of castings 100, constructed of a conducting material,are secured to the insulating bar by means of screws 101, Figure 19.These castings are spaced to form a series of gaps. Conducting' spheres102 of a non-magnetic material are disposed for closing the gaps and arefree to move into sockets 103 parallel to the longitudinal axis of thetube or sockets 104 at right angles to the longitudinal axis of thetube; such movement opening the gaps and consequently breaking theelectrical circuit through the tube. Due to the arc extinguishing fluidin the tube, these spheres will move into and out of the sockets withplunger-like action. A means is provided on the 13 end of the tube forfilling it with are extinguishing fluid and making the final seal afterit is filled. The base 93 is drilled and tapped to receive the hermeticsealing screw 105, Figure 20. The base and seat of the screw head isprovided with concentric grooves, as shown in Figure 10, so that whenthe screw is tightened against a soft metal washer 106, the grooves willcut into the washer and form a hermatic seal.

Figures 2, 3, and 4 show a unit pole of the gang operated switch mountedin various positions upon a sustaining structure. The various parts ofthe switch which it would be necessary to reassemble in order to adaptthe switch to a different mounting are clearly shown in these figures.Assuming that the switch was originally mounted as shown in Figure 2 andthat it was desired to remount it in a vertical position as shown inFigure 3, the only changes which would be necessary would be to turn thetube end for end having the A end of the tube at the contact rather thanthe 13 end as shown in Figure 2, and also interchange the male andfemale members of the contact. In changing from the mounting shown inFigure 3 to that shown in Figure t the insulators 3 and 7 should beturned end for end and the tube rotated 180 degrees about itslongitudinal axis. A slight change in the assembly of the operatingmechanism may be necessary when changing from one mounting to another,but as the operating mechanism is readily adapted to each mountin nodifiiculty is experienced in making any change required. It is thusevident that the switch may be readily adapted for any mounting simplyby a reassembly of a few parts. Enlarged views of the tube 92 are shownin Figures 16, 17, and 18 with cut-out portions, the tubes being placedin their relative positions as shown respectively in Figures 2, 3, andi.

The drawings show only one tube mounted on each unit pole of a gangoperated switch. It is within the contemplation of this invention,however, to include various combinations of contacts within the tube andalso one or more tubes mounted on each unit pole of the gang operatedswitch. For example, there is shown diagrammatically in Figure 13 onetube having the contacts in the tube connected electrically in series.An additional similar tube is shown in dotted lines connected inparallel with the first tube. Instead of using the combination shown inFigure 13 the same effect might be accomplished by the use of one tubeas shown in Figure 14 having two rows of contacts in series, each rowbeing connected in multiple inside the tube. Electrically Figure 13 andFigure 14 would be the same, except that in Figure 13 two tubes would benecessary, whereas in Figure 14 only one tube would be used. Anothercombination would be that shown in Figure 15, in which there is one tubewith two rows of contacts, but instead of the contacts beingelectrically connected in series, they are connected in multiple. It istherefore evident that a large variety of connections are possibleeither within a single tube or by the use of a number of tubes.

Since the function of the operating mechanism is the same for eachmounting of the switch, it will not be necessary to describe itsoperation in detail for the different mountings respectively of theswitch. The operation of the switch is then as follows:

Referring to Figure '7, the switch being in the closed position, theclevis 13 is rotated through an angle of 120. This movement of theclevis will rotate the insulator '7 through the same angle, andcoincidentally move the crank member 43 and the lower pivot member 62through a corresponding angle. This movement of the lower pivot memberdraws the upper pivot member 53 downwardly in a vertical plane, therebycausing the switch blade 48 to swing through an angle of 90 in avertical plane. The relative positions of the universal swivel toggle,when in the closed position of the switch and when in the open positionof the switch, are pictorially represented by Figures 11 and 8respectively. The opening of the switch blade moves the crank memberdownwardly and by an angular displacement and translatory movement movesthe fiuid switching unit to a position which will cause the contactmechanism to function and open the electrical circuit. The detailedoperation of the contact mechanism of the fluid switching unit is fullydescribed in my co-pending application Serial No. 378,848, filed July17, 1929. The closing of the switch is accomplished by rotating theclevis 13 back to its original position, which will in turn establishthe circuit through the fluid switching unit and close the switch blade48 thereby completing the electrical circuit through the switch. It isto be observed that when the switch is in the closed position, theuniversal swivel toggle will be in the position shown in Figure 11. Inthis position, the toggle is in the vertical plane of operation of theswitch blade and being on dead center will effectually lock the blade inthe closed position.

The use of this invention provides a gang operated disconnecting switchwhich may be mounted in any position simply by a reassembly of parts. Aswitch is provided which may be opened under load without establishing aflaming arc and therefore does away with the hazards due to such arcs.This invention provides an operating mechanism which will be effectiveto lock the switch blade in the closed position. Improved means forsupporting the rotating insulator is provided in a bearing which willpermit the switch to be mounted on a fiat surface. The universal swiveltoggle provides an improved means for changing the rotary motion of therevolving insulator into the vertical motion for operating the switchblade.

I am aware that numerous details of construction may be varied through awide range without departing from the principles of this invention, andI therefore do not purpose limiting the patent granted, otherwise thannecessitated by the prior art.

I claim as my invention:

1. A switch comprising a base, an insulator support mounted rotatable onsaid base, a hightension insulator secured at one end on said support, aswitch blade supported on the other end of said insulator, meansconnecting said insulator and said blade for movement of said blade,said base being adapted to be positioned in normal horizontal, vertical,and inverted horizontal positions to position the switch in similaroperative positions, a vertical rod, and means connecting said rod andsaid insulator support to rotate said insulator on its longitudinal axisin each of the operative positions thereof, said means comprising alever on said insulator support extending parallel to said base, a leveron said rod extending substantially normally thereto, and articulatedmembers connecting said levers.

2. A switch, comprising an elongated base, a first insulator verticallymounted on said base and being provided with a switch contact, a secondinsulator vertically mounted on said base, said second insulator beingmounted rotatable on its vertical axis, a third insulator mounted onsaid base and positioned rearwardly of said second insulator, a rigidmember mounted supported on said second insulator, said member having anupwardly and rearwardly bent arm and having another arm extendingrearwardly and connected to said third insulator, a switch bladefulcrumed on said bent arm, a rearwardly extending crank on said secondinsulator, and articulated link means connecting said crank and saidswitch blade whereby rotation of said second insulator produces movementof said blade in a plane parallel to the vertical axis of said secondinsulator.

3. A switch, a base, a first insulator vertically mounted on said baseand mounted rotatable on its own vertical axis, a second insulator onsaid base and positioned rearwardly of said first insulator, a switchblade extending forwardly of said first insulator, a support for saidblade mounted supported on said first insulator and including anupwardly and rearwardly inclined arm and another extending rearwardlyand connected to said second insulator, said first insulator beingjournaled in said blade support, said blade being fulorumed on saidupwardly inclined arm, a rearwardly extending crank on said firstinsulator, and articulated link means connecting said crank and saidblade, whereby rotation of said first insulator produces movement ofsaid blade in a plane parallel to the vertical axis of said firstinsulator.

4. A switch, comprising a base, a vertical insulator, means connectingone end of said insulator to said base whereby said insulator issupported turnable on its vertical axis, a bracket, a member secured onthe other end of said insulator and including a shaft extending throughand journaled in said bracket, a crank arm connected to said shaft, saidcrank arm having an upstanding end portion, a switch blade supporthinged on said bracket and being provided with an upstanding terminalportion, insulator means on said base connected to said bracket toanchor said bracket against turning, and means connecting the upstanding terminal portion of said switch blade support with theupstanding terminal portion of said crank arm whereby rotation of saidinsulator on its vertical axis produces movement of said blade supportin a vertical plane, said means comprising pins connected turnable ineach of said upstanding portions, respectively, saddles pivotallyconnected to each of said pins, respectively, and a vertically disposedlink connecting said saddles and journaled for turning therein.

5. A switch having a base and a vertical insulator mounted thereonrotatable on its vertical axis, a switch blade, operating meansconnected to said insulator and to said switch blade for movement of theblade in a vertical plane upon turning of said insulator on its verticalaxis, said means comprising a bracket mounted on said insulator, a shaftsecured to said insulator and journaled in said bracket, a crank armsecured to said shaft and swingable in a plane normal to the verticalaxis oi. said insulator, a switch blade support hinged on said bracket,and vertically disposed articulated link means connecting said crank armand said blade support.

ERNEST E. ANDERSON.

